Paper-box machine.



No. 630,596. Patented Aug. a, |899.

W. G. COWELL.

PAPER BOX MACHINE.

(Application led July 15, 1398.)

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No. 630,596. Patented Aug. B, 1899.

W. G. CGWELL.

PAPER BOX MACHINE.

(Application Bled July 16, 1898.) if.

{Np Model.) 4 Sheets-Sheet 2.

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wf e. cowELL. PAPER' BOX MACHINE.

(Application led July 15, 1898.)

4 Sheets-Sheet 3- (No Model.)-

No. 630,596. Patented Aug. 8, |899. W. G. COWELL.

PAPER BOX MACHINE.

(Application Bled July 15, 1898.)

ENO Model.) 4 Sheets-Sheet 4.

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WI/T am UNITED STATES.

PATENT OFFICE.

VILLIAM G. COWELL, OF NEW' HAVEN, CONNECTICUT.

-PAPERBOX MACHINE.

SPECIFICATION forming part of Letters Patent No. 630,596, dated August 8, 1899.v Application nea my 15, 189s. serial Nt. 686,080. ci@ model.)

To @ZZ whom t may concern.:

Be it known that I, WILLIAM G. CowELL, of New I-Iaven, in the county of New Haven and State of Connecticut, have inventeda new and useful Improvement in Paper-Box- Making Machines, of which the following is Figure l is a side elevation, Fig. 2 a longitudinal section, and Fig. 3 a plan, of a Inachine embodying my invention, Fig. 4 being an end elevation and Fig. 5 a detail enlarged, showing the operation ofthe blank-receiving table.

In the drawings, A is the bed, which has at one end a pair of bearings a to receive the spindle which carries the paper-roll B.

The flattening mechanism or mechanism for taking the curl out of the paper, as`

shown, is constructed as follows: C C are two side frames mounted upon the bed A, near one end thereof. In this frame is pivotally mounted at c a pair of arms C. These arms are connected bya cross-brace C2 and at their outer ends carry the guiding-rollV C3. The cross-brace C2 carries two uprights or ears e', in which is pivotally mounted a socket-piece c2. C4 is a second cross-bar which is pivotally mounted in the upper part..

of the frames C and carries a threaded opening c3, through which passes a screw c4, the lower end of which sets into the opening in the socket-piece c2 and is confined therein, so

as to raise and lower the arms C and roll C3. v

The upper end of this screw carries a handwheel c5. By turning the hand-wheel the position of the guiding-roll C3 will be adjusted. The frames C also carry two rolls C5 C6, which are a suficient distance apart to -allow the roll C3 to pass freely between them and carry the two thicknesses of paper with it. These rolls are-intended to give a curve to the paper the reverse of that which it has in the roll The operation of this part of my mechanism is as follows: Where the roll B is placed upon the machine in the manner shown in the drawings, (see Fig. 2,) so that the paper rolls off from the under side of the roll, the

paper is passed up and over the roll C5, then down under the roll C3, and up over the roll CG and through the machine, as shown. The paper which comes from nearer the interior of the roll is of course curled to a greater extent than that which comes 0E from its outside, and hence requires to be given a more of a reverse curl to atten it. The position of the roll C3 is therefore made adjustable, and as the center of the roll B is approached the screw c4 is turned to lower the roll C5 between the axes of the rolls C5 C6, so as `to drag the paper over more and more of the surface of these rolls. Thus thepaper may be given as much of av reverse curl as may be necessary to overcome the curl which is given it in the roll B.

In case the position of the rollB is reversed, so that the paper comes o from the top of the roll instead of the under side, the strip of paper is passed under the roll C5, over the roll C3, and under the roll C6, and in order that the machine may be effective for this purpose I prefer to have the screw c4 of considerable length, so as to givea considerable range' of movement to the roll C3.

y The paper-roll should be located apart from the flattening-surfaces and in such relation thereto that the paper on leavin g the roll may be drawn over these surfaces in a direction the reverse of that in which it is rolled.

In the machine shown in the drawings the next step in the preparation of the boxes is the printing, and this may be accomplished by means of a printing-press of any desired kind. I have shownl in the drawings at D the diagrammatic representation of such a press to indicate its general relations to the other parts of the machine; but any form of press may be used for the purpose. -A

d is the gear mounted on the lower roll of the press, by which power is applied thereto.

At E, I have shown a frame lcarrying a pair `of rolls e e', provided with knives for cutting and scoring the blank. The upper roll is adjustable to the thickness of the paper. Such rolls and their use are well known in the art and need no further description. They also IOO provide the feed for the strip. Upon the axis which carries the lower roll c' is mounted a pulley A', by means of which power is applied to the roll e and through it and the gears e2 and eS'to the gear d and printingpress. It is well known that the knives of such rolls as are shown at c c may not always cut entirely through the paper and do leave points or tacks of attachment, and hence unless means are provided to finish the cutting a strip of partially-detached blanks will be formed instead of a pile of entirely-detached blanks. In order to insure the detachment of the blank, I provide a detaching mechanism which consists of a pair of rollers F F, mounted in a frame F2. The upper roll F is mounted in adjustable bearings, so that its height and the pressure with which it bears upon the paper which runs between it and the lower roll may be adjusted. The shaft of the lower roll F is provided with a pulley F3, and power is applied to this pulley to speed it more rapidly than the normal feed of the papel'. This may be done by belting pulley F3 to pulley A or in any other desired way. Thus the rolls F F when they grip the paper will tear it at its weakest spot-namely,where it has been scored or partially cut by the cutting and scoring mechanism E. Between the cutting mechanism and this detaching mechanism there is a table f, supported by the frame E F2 in order to properly guide the advancing sheet between the rolls F F. I also show a stacking mechanism to secure the 'blanks from the detaching-rolls.

The stacking-table G is carried by two slides G G, sliding in grooves in the two side frames G2 G2. Each slide has a rack in which works the pinions g g, mounted upon a shaft g', journaled in bearings en the side frames G2 G2 and carrying a worm-gear g2,loose tl1ereon,wl1ich engages with the worm g3. g5 is a ratchet fast on the shaft g', and g6 is a pawl on the gear g2. The rotation of the shaft g in the direction to allow the table G to descend will rotate the ratchet, and hence, by means of the pawl g5, the wor1n-gearg2 and worm g3. Power is applied to this worm g3 to restrain any tendency of the table G to drop too rapidly and to control its movement. I have indicated a handle g4 for this purpose. lVhen the table has reached the end of its movement, any further movement on the part of the worm and gear will be ineective to move the shaft g. A handle Q7 is used to turn the shaft g to raise the table G. By timing the movement of the worm the table G may be allowed to descend exactlyin proportion to the speed with which the blanks are fed out by the detaching mechanism.

In order that the blanks J may lie in an even stack, I prefer to provide a stop II, pivoted at 7L to arms H', which extend out from the uprights G2. This stop is preferably latched in place by means of a hook h. The blanks then being fed forward by the detaching-rolls will strike the stop H and, the table having been previously lowered just the proper distance, will settle down and rest upon the stack of blanks below it. The table G may then descend slightly in time to properly receive the next blank in turn.

In practice I prefer to apply power to the machine by means of the pulley A on the axis of the roll c'. From this pulley power is transmitted through roll e and gears e2 c3 to the gear d', which is part of the printing mechanism, and by means of a belt (not shown) to pulley F3, which is mounted on one of the detaching-rolls. By this means thc feed of the `machine is controlled, the difference of diameters between A and F3 giving the detaching-rolls an increased speed over the normal feed, and thusinsuring their detaching action.

I have described in detail so much of the mechanism shown in the drawings as is new to me; but it is evident that these details may be altered without taking from the machine those characteristics which are new with me.

The mechanism for flattening the paper is of course applicable elsewhere than in machines for making paper boxes, and its elliciency is due to the drawing of the paper over one or more flattening-surfaces in such a direction as to give the paper a curl the reverse of that which it had in the roll Of course the amount of this reverse curl given the paper is controlled by the location of what I have called the guiding-roll, and it is evident that the means whereby the guiding-roll is adjusted between the flatteningsurfaces (whether they be rolls or not) may be changed somewhat without departing from the spirit of my invention, its supportingframe, however, being the simplest manner of suspendingit now known to me.

To insure the proper action of the detaching-rolls, they should be located near to the cutting-rolls, so that as soon as a blank is eutirely free from the cutting-rolls it will be gripped by the detaching-rolls.

I have described the paperboardlowering mechanism as a worm and worm-gear and have shown a handle connected to said worm; but it is evident that this is merely diagrammatic, as power may be applied in any desired manner to control the movement of the worm. Moreover, while I believe the mechanism controlling the descending table to receive the stack of blanks is best constructed in the manner shown it will be evident to any mechanic that its details may be varied to suit any given circumstances, the novelty of the device being, so far as I am aware, the use of a table which may be caused to descend at a rate corresponding to the rate at which the height of the stack of blanks increases, so that the detaehing mechanism may feed each blank on a level into the position which it is to occupy.

I have referred to the blank-cutting mechanism as providing the feed for the strip; but

IOO

IIO

it is evident that other means may be provided for this purpose if thought best.

What Iclaim as my invention is- I. Ina paper-attening mechanism, in combination with a pair of iiattening-surfaces, the guiding-roll lying between said surfaces and mounted in a pair of pivoted arms C carried in a suitable frame C, said arms also being pivot-ally connected to an adj usting-screw c4 also mounted in said frame C, wherebythe location of said roll C3 may be adjusted, as and for the purposes set forth.

2. In a paper-box machine, in combination with a blank receiving table mounted between suitable guides and mechanism whereby its descent may be controlled, a stop hung upon said guides in line with the desired front edge of the pile of blanks and adapted to be lifted for removal of said blanks, and means whereby said stop may be held in place in its lowest position, as and for the purposes set forth.

3. In a paper-box machine, in combination with a detaching mechanism whereby the blanks are detached and are fed forward, a table located to receive said blanks as they come from said detaching-rolls, said table being mounted in suitable slides and provided with a stoplocated in line with the desired front edge of the pile of blanks, said stop being adapted to be lifted in order to Withdraw the blanks and to be locked in its lowest position, as and for the purposes set forth.

In testimony whereof I have hereunto set my name this 5th day of July, 1898.

WILLIAM G. COWELL.

lVitnesses:

OLIVER S. WHITE, HENRY D. WHITE. 

